Ice Core Quality in Electro-Mechanical Drilling

Using an electro-mechanical drill working on the principle developed by J. Rand and H. Rufli, four holes have been drilled in different locations. In each of these drillings it has been observed that the core quality was excellent in the firn, but the ice, fractures appeared. Certain pieces of core...

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Bibliographic Details
Main Authors: Gillet,F., Donnou,D., Girard,C., Manouvrier,A., Rado,C.
Other Authors: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE GRENOBLE (FRANCE) LAB DE GLACIOLOGIE
Format: Text
Language:English
Published: 1984
Subjects:
*ICE
*DRILLING MACHINES
SNOW
CORE SAMPLING
CORES
FRACTURE(MECHANICS)
DRILLING
ELECTROMECHANICAL DEVICES
QUALITY
FRANCE
Component Reports
Ice cores
Rufli Rand drills
Firm snow
Canada
ice core
Online Access:http://www.dtic.mil/docs/citations/ADP004811
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP004811
Description
Summary:Using an electro-mechanical drill working on the principle developed by J. Rand and H. Rufli, four holes have been drilled in different locations. In each of these drillings it has been observed that the core quality was excellent in the firn, but the ice, fractures appeared. Certain pieces of core were highly broken and sometimes core was completely sliced into irregular discs 1 or 2 cm thick. After a brief description of the drill, we describe the main phenomena observed and attempt to determine the possible causes of the fracturing. This article is from 'Proceedings of the International Workshop/Symposium on Ice Drilling Technology (2nd) Held at Calgary, Alberta, Canada on 30-31 August 1982,' AD-A156 733, p73-80.

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